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Flares and variability from Sagittarius A(star): five nights of simultaneous multi-wavelength observations
(EDP SCIENCES S ALES ULIS CEDEX A, 2012)
Aims. We report on simultaneous observations and modeling of mid-infrared (MIR), near-infrared (NIR), and submillimeter (sub-mm) emission of the source Sgr A * associated with the supermassive black hole at the center of ...
A lucky imaging multiplicity study of exoplanet host stars - II
(Oxford Univ Press, 2016)
The vast majority of extrasolar planets are detected by indirect detection methods such as transit monitoring and radial velocity measurements. While these methods are very successful in detecting short-periodic planets, ...
Construção de uma sonda remota para um espectrômetro utilizando detector de NaI(TI) e a fluorescência de raios X por dispersão em energia
(Universidade Federal de Minas GeraisUFMG, 2014-12-09)
This research project aims the utilization of NaI(Tl) cylindrical detectors with different sensitive volumes in the Nuclear Instrumentation Laboratory (LIN) of the Department of Nuclear Engineering at UFMG (DEN-UFMG) for ...
Soldagem por fricção convencional entre a liga de alumínio 6351-T6 e o aço SAE 1020 assistida por indução eletromagnética
(Universidade Federal de Minas GeraisUFMG, 2017-03-07)
Friction welding has become interesting in terms of its application. In this context, this paper aimed to evaluate the effect of preheating the conventional friction butt welding between the aluminum alloy AA 6351-T6 and ...
Dynamical stellar masses via high angular resolution techniques
(Universidad de Valparaíso, 2021)
Multiple stellar systems are abundant in our galaxy. Almost half of solar-like field stars have at least one companion. Multiple systems are the perfect playground to de- termine the stellar mass, which the one of the ...
The dust disk and companion of the nearby AGB star L-2 Puppis SPHERE/ZIMPOL polarimetric imaging at visible wavelengths
(ESO, 2015)
The bright southern star L-2 Pup is a particularly prominent asymptotic giant branch (AGB) star, located at a distance of only 64 pc. We report new adaptive optics observations of L2 Pup at visible wavelengths with the ...
A binary engine fuelling HD 87643's complex circumstellar environment Determined using AMBER/VLTI imaging
(EDP SCIENCES S A, 2009)
Context. The star HD 87643, exhibiting the ""B[e] phenomenon"", has one of the most extreme infrared excesses for this object class. It harbours a large amount of both hot and cold dust, and is surrounded by an extended ...
GNIRS NIR Integral Field Spectroscopy of NGC 5128
(Asociación Argentina de Astronomia, 2020-07)
Presentamos observaciones del núcleo activo de NGC 5128 obtenidas con la unidad de campo integral (IFU) disponible en el espectrógrafo GNIRS hasta 2007. Este es el AGN más cercano y está completamente oculto al rango óptico ...